“6. For the purposes of paragraph 7A (2) (c) of the Act, each of the following is a prescribed class of fire:
(a) a fire lit, maintained or used at a factory if the fire is lit, used or maintained in a building or other structure and reasonable steps have been taken to prevent the escape of fire, sparks or incandescent or burning material from the building or other structure;
(b) a fire lit, maintained or used by or under the authority of any person or body of persons, whether corporate or unincorporate, for or in conjunction with the repair or maintenance of services or equipment essential for continuance or restoration of the supply of heat, light, power, water, sewerage, transport or communication where—
(i) the Chief Fire Control Officer has been notified of the intention to light, maintain or use the fire; and
(ii) reasonable steps have been taken to prevent the escape of fire, sparks or incandescent or burning material from the place where the fire is lit, maintained or used;
(c) a fire lit, maintained or used for the purpose of using a heating appliance anywhere on land, whether unleased land the property of the Commonwealth or land held under a lease from the Commonwealth or in fee simple, if—
(i) the appliance is under the control of a responsible adult who is present at all times while the appliance is in use;
(ii) the area around the appliance for a distance of not less than 3 metres is cleared of flammable material while it is in use; and
(iii) a means of applying a continuous stream of water is available for immediate use.”.